The Arctic Ocean in 1983, and a Russian sub makes its way through the depths. When they receive a fire signal, Captain Zhukov has the crew prepare for launch. As Zhukov prepares to press the fire button, Professor Grisenko comes out, singing. The captain points out that they were in the middle of a drill and orders all hands to stand down. Lt. Stepashin suggests that they run the drill again because of recent NATO exercises, but Zhukov dismisses it as mere saber-rattling...Read the full recap
Clara: Are we going to be okay?
The Doctor: Oh, yes.
Clara: Is that a lie?
The Doctor: Possibly.
The Doctor: A native of the planet Mars. And we go way back. Way back.
Captain Zhukov: Martian, you can't be serious?
The Doctor: I'm always serious. With days off.
The Doctor: Skaldak won't talk to you. You're--you're an enemy soldier.
Captain Zhukov: And how would he know that?
The Doctor: A soldier knows another soldier. He'll smell it on you, smell it a mile off.
Captain Zhukov: And he wouldn't smell it on you, Doctor?
Clara: How'd I do? Was I okay?
The Doctor: This wasn't a test, Clara.
Clara: I know. But...
The Doctor: You were great, yeah.
The Doctor: Really.
The Doctor: Professor, I could kiss you.
Professor Grisenko: If you insist.
The Doctor: Later.
Skaldak: My world is dead! But now there will be a second Red Planet. Red with the blood of humanity.